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Wireless passive resistance corrosion monitoring method and system

A corrosion monitoring, wireless passive technology, applied in the field of wireless passive resistance probe pipeline corrosion detection, can solve the problems of waste of manpower and material resources, occupying space, unsuitable pipelines, etc., and achieve the effect of occupying a small volume

Pending Publication Date: 2021-12-21
泉州泰洋科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing pipeline resistance probe corrosion monitoring technology, since the sensitive element of the resistance probe needs to be attached to the probe rod, one end of the data transmission line must be connected to the sensitive element, and the other end must be connected to the external monitoring equipment through the aviation connector. This requires opening holes in the on-site process pipeline and connecting them with flanges, which not only causes great damage to the original structure of the pipeline, but also takes up a lot of space, which is not suitable for pipeline monitoring in narrow spaces
On the other hand, most of the current on-line resistance probe corrosion monitoring systems use bus transmission technology for data transmission, and it is necessary to lay data transmission cables between the equipment monitoring point and the monitoring room, which will be subject to many restrictions, such as bus length, connection The number of monitoring equipment, etc., often need to lay multiple data transmission bus cables in one site to meet the needs of the corrosion monitoring system, resulting in a lot of waste of manpower and material resources

Method used

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  • Wireless passive resistance corrosion monitoring method and system
  • Wireless passive resistance corrosion monitoring method and system
  • Wireless passive resistance corrosion monitoring method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] refer to Figure 1 to 6 , The corrosion resistance of passive wireless monitoring method, comprising the following steps: S101, the test preparation of the flexible conduit is attached to the corrosion probe, and selecting service environment.

[0039] Specifically, the configuration of the flexible corrosion probe comprising inductor L R , For detection of the probe tip and the inductor L T Mutual inductance of the coil is formed, a passive internal corrosion wireless information acquisition. And a special plurality of resistance as the sensing element. The probe is a flexible tube pre-fitted to the outer pipe 4 and the protective layer between the reinforcing layer 2, the resistance can be gradually increased with its plurality of pipeline corrosion resistance will be.

[0040] S102, the flexible probe cover detection position of the tube to be detected, in order to determine a fixed mutual inductance coil pitch H 1 Collected close to the magnitude U i Under continuous n f...

Embodiment 2

[0049] Corrosion resistance probe based wireless passive detection method according to a first embodiment of the duct, the present embodiment gives a mutual inductance winding pitch H 1 And excitation frequency, sampling points for the experimental embodiment of the method of particular value to verify the validity of the method.

[0050] Analysis tool used for the Network Analyzer, the excitation frequency is 1kHz to 12MHz, equidistant variation acquiring the frequency range between 1000 sampling points frequency (f 1 2 n-1 n ), N = 1000 (f 1 = 1000Hz, f 2 = 13011Hz, f 3 = 25022Hz, ...... f 1000 = 11.9MHz). Such as Image 6 Indicated. To facilitate verification experiment between the detection probe and the probe body is placed plexiglass embedded resistor to simulate the outer protective layer pipe, and the resistance change due to corrosion of the variable resistor analog selection, select the variable resistance 5, respectively 1.6 Ω, 4.6Ω, 12Ω, 21Ω, 28.9Ω.

[0051] according t...

Embodiment 3

[0054] A wireless corrosion monitoring method of a passive resistor, comprising the steps of:

[0055] S101, the test preparation of the flexible conduit is embedded corrosion probe;

[0056] S102, wrapping using a flexible probe to detect the magnitude of the reception pipe wall U i Under continuous n frequency excitation voltage U across the resistance o ;

[0057] S103, seeking voltage gain at each frequency of the n points, G = 10log 10 (U o / U i );

[0058] S104, rendering sampling points - graph of gain;

[0059] S105, considering the characteristic curve, determine the extent of corrosion.

[0060] Wherein, when the position of said probe cover corroded constant period, receives the detection probe R 1 Both ends of the detection signals, comprising: T in each etching cycle i Obtaining respective average excitation frequency (f 1 2 n-1 n ) Probe at a resistor R 1 The detection signal voltage value (U generated across 1i U 2i , ......, U (n-1)i U ni ), The gain of rendering ...

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Abstract

The invention discloses a wireless passive resistance corrosion monitoring method and system. According to the technical scheme, the wireless passive resistance corrosion monitoring method comprises the following steps that a prepared flexible corrosion probe is embedded between a protective layer and a reinforcing layer of a pipeline when the pipeline is machined; the flexible corrosion probe comprises an inductance coil LR which is used for forming a mutual inductance coil with a detection probe end inductance coil LT, and wireless passive internal corrosion information acquisition is carried out; the flexible corrosion probe further comprises a number of special resistors which are used as sensitive elements, and the resistance of the resistors can be gradually increased along with the corrosion of the pipeline; and a service environment is selected, and corroding is carried out for a certain period. The wireless passive resistance corrosion monitoring method and system can be used for detecting a corrosion event of a single pipeline or equipment in a non-contact manner and monitoring the integrated corrosion rate of the pipeline or equipment after a period of time; and the method and the system have the advantages that the original structure of the pipeline does not need to be damaged by trepanning, and probe data can be obtained in a non-contact mode.

Description

Technical field [0001] The present invention relates to the field of detecting pipeline corrosion, particularly to a wireless passive pipeline corrosion resistance probe detection methods and systems. Background technique [0002] With the growing energy needs of mankind, energy storage and transport safety more and more attention. Wherein the anti-corrosion oil and gas pipelines is a top priority. In the actual use of the process, many factors will directly lead to corrosion of the pipe. Thus, part of the equipment during the manufacture of the pipe that is added to the outer protective layer to protect the security of corrosion of oil and gas pipelines. In recent years, due to the large number of high-sulfur crude oil refining, oil and gas transportation pipeline in the daily production, on the one hand contains a large amount of chloride ions, carbon dioxide, hydrogen sulfide, dissolved oxygen, bacteria and other corrosive media, corrosion causes an internal pipe, on the other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04F17D5/00
CPCG01N27/041F17D5/00
Inventor 胡洋殷晓康刘志梅马金成文凯杰邓承杰肖阳
Owner 泉州泰洋科技有限公司
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